Double Flanged Butterfly Valve

Connection Type

Flanged

Actuation Type

Lever, Gear, Pneumatic, Electric, Hydraulic

ZZJG double flanged butterfly valve is a durable flow control component with standard flanges on both ends, bolted directly to pipelines for leak-tight connection. It regulates fluid flow via a 90-degree disc rotation, suitable for water treatment, chemical, oil & gas, and HVAC systems. Available in various sizes (DN50-DN2000), pressure ratings (PN10-PN16), and materials (ductile iron, carbon steel, stainless steel), it meets international standards (API 609, ISO 5208) for reliable on-off and throttling service.

ZZJG's Advantages

Superior Stability: Double flanged design ensures firm pipeline fixation, anti-vibration, and no displacement in high-pressure environments.
Excellent Sealing: Bidirectional sealing achieves zero leakage, meeting strict standards for critical systems like fire protection and chemical pipelines.
Easy Installation & Maintenance: Standardized flanges simplify installation; detachable wearing parts reduce downtime and costs.
Energy Efficient: Streamlined disc design minimizes flow resistance and pressure loss, cutting energy consumption.
Versatile: Customizable in size, material, and drive mode (manual/electric/pneumatic) for diverse working conditions.
Quick Operation: 90-degree disc rotation enables fast on-off control with precise angle adjustment.
Long Service Life: High-strength materials and strict quality control ensure stable operation in harsh environments.

Product Details

Spec	Detail
Size Range	DN50~2000mm (NPS2"~80")
Pressure Class	PN0.6~1.6MPa (Class150)
Matrial	Cast Iron, Ductile Iron, WCB, LCB, CF8, CF8M, CF3, CF3M, A890 4A
Standards	ANSI, API, CE, DIN, EAC, JIS, ISO, EN

Professional Quality

Various Types

ZZJG offers one of the most comprehensive butterfly valve product lines from a single manufacturer including triple-offset butterfly valves, double-offset butterfly valves, high performance butterfly valves etc.

Service Support

ZZJG range of aftermarket services encompasses valve repair, refurbishment, maintenance, custom engineering solutions, and genuine OEM spare parts to sustain optimal equipment performance well after installation.

Processing Ability

ZZJG employs advanced manufacturing technologies using state-of-the-art machinery and equipment to ensure our products perform in the most challenging environments.

Why ZZJG Butterfly Valves?

API 609 International Certification

Fully compliant with API 609 international standard, covering all structural types including double flange, lug, and wafer types, and has obtained global market access qualifications for the petroleum, chemical, and power industries. Class 150 ~ 2500 (PN20 ~ PN420), NPS2" ~ NPS200" (DN50 ~ DN6000), temperature range -40℃ ~ 600℃, zero-leakage, and fireproof with API 607.

Leading Eccentric Structure Design

Double and triple eccentric design, the valve shaft, valve seat, and pipeline centerline are precisely offset, significantly reducing friction and wear. Bidirectional zero-leakage pressure, with built-in anti-sludge and self-cleaning functions, suitable for harsh media such as sewage and slurry, and with a service life more than 3 times longer than conventional butterfly valves.

Reliable and Guaranteed Quality

Founded in 1981 and located in the valve capital of China, this company is a certified National High-Tech Enterprise with R&D investment exceeding 5%. Its 12-step full-process testing procedure, from material verification to finished product delivery, adheres to API 609 inspection standards to ensure zero-defect delivery.

Customized Services for All Conditions

Adaptable to all media including water, steam, oil, acids, alkalis, and gases, meeting the needs of core industries covered by API 609, such as petroleum, natural gas, chemical, and power. Specialized models are developed for different scenarios, such as fully welded, leak-free butterfly valves for heating pipelines and hydraulically controlled slow-closing check valves for hydropower stations.